The onvegetables vegetable crop report. Picture of south western ontario divided by counties and coloured based on degree days. Southern counties are red, central counties are orange and northern counties are green. bubble pictures of onion maggot on a leaf, leak moth on a trap, carrot weevils, onion downy mildew, and yellow sticky traps in an onion field
Disease Insects Pest Management Vegetables

VCR – Vegetable Crop Report – May 23, 2019

The VCR (vegetable crop report) is a weekly update which includes crop updates, weather and growing degree summaries for various vegetable growing regions across Ontario. Continue Reading VCR – Vegetable Crop Report – May 23, 2019

Ontario DD Map May 22Temperature – Many regions are at or below the 10-year average accumulated degree day average so far this year. Sudbury has had just over half the growing degree days compared to its 10-year average while Huron, Wellington, and Simcoe County are marginally ahead. While some regions are now receiving average temperatures resulting in average growing degree days, the lack of sun has likely slowed the growth of many crops in most planted areas.

Rainfall –  Most regions have had above average rainfall in March and April and many are on track to also exceed the average rainfall in May. Precipitation levels shown in the charts below for 2019 show the precipitation up to May 22nd compared to the total monthly average of the previous 10 years. The recent pause in rainfall this week has allowed some growers entry into the field to begin planting, however seeding is still delayed in many regions.

Crop Updates

Brassica Crops –  Cool night temperatures have resulted in some plantings with tip dieback. The degree day threshold for cabbage maggot emergence has not been reached in all areas of the province. 

Carrots –  We are just getting into the bulk of seeding this week. Carrots are not too far behind schedule but some early carrots fields went in a little later than usual. Carrot fields that have emerged look great.

Celery – Transplanting is underway in many areas and insect pressure is low.

Garlic – Overwintering leek moth adults have been detected in traps across Southwestern Ontario. Use pheromone traps to monitor populations on a weekly basis to accurately time management strategies. Dig up any wilted plants you find and check for maggots, lack of basal plate or feeding damage.

Onions –  The last week has allowed many acres of direct seeded onions and transplants to be planted. Early seeded onions are at the loop to flag leaf stage. Agricorp extended the direct seeded onion planting date onion to yesterday, May 22nd, and the Spanish onion planting date of May 20th is extended to May 27th. The first generation of onion and seedcorn maggot flies are active in Essex, Chatham-Kent and Norfolk. Check for insect pressure by digging up wilted/stunted plants and scout for maggots or feeding damage.

Potatoes – Potato planting is behind schedule due to the precipitation, but is now ramping up in most regions. Be wary of emergence issues and seed rots when planting into cold and wet ground. If you’re using cut seed, allow it to suberize/heal before planting, especially if you’re also using a liquid seed treatment.

Tomatoes – Tomato planting started on May 15th and only about 20% of the crop is in the ground, compared to 60% seen in past years. For those that have planted, moist soil conditions are ideal for black cutworm and wireworm. Growers should keep an eye out for damaged transplants, especially along field edges and in areas were there was significant weed cover before tillage.

Pest Degree Day Forecasting

Select a region below for the latest weather, crop and pest degree day information:

Essex County
Chatham-Kent County
Norfolk County
Huron County
Wellington County
Simcoe County
Durham County
Peterborough
Kemptville
Sudbury

Essex County

EssexDDMay22

EssexTPMay22

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Chatham-Kent County

ChathamDDMay22ChathamTPMay22

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Norfolk County

NorfolkDDMay22NorfolkTPMay22

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Huron County

HuronDDMay22HuronTPMay22.JPG

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Wellington County

WellingtonDDMay22.JPGWellingtonTPMay22

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Simcoe County

SimcoeDDMay22SimcoeTPMay22

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Durham County

DurhamDDMay22DurhamTPMay22

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Peterborough

PeterboroughDDMay22PeterboroughTPMay22

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Kemptville

KemptvilleDDMay22KemptvilleTPMay22

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Sudbury

SudburyDDMay22SudburyTPMay22

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PestCarrot Rust FlyOnion Maggot Carrot WeevilAster LeafhopperTarnished Plant Bug Cabbage Maggot Seedcorn Maggo
THRESHOLD329-395210138-15612840314200
Essex 39433418411038230263
Chatham-Kent 3482901538524194230
Norfolk 3172641357215174201
Huron 233188864110113139
Wellington 22017874325103131
Simcoe County21717373327100128
Durham 22318079398107125
Peterborough23819490407119138
Kemptville255211106558136157
Sudbury 1188827804264

Thresholds

Use these thresholds as a guide, always confirm insect activity with actual field scouting and trap counts.

1 comment on “VCR – Vegetable Crop Report – May 23, 2019

  1. Pingback: Vegetable Crop Report – May 23, 2019 | ONOrganic

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